Friction screw-lifting mechanism



Dec. 4, 1928.

S. STRUNGE FRICTION SCREW LIFTING MECHANISM Filed April 17, 1926 2 Sheets-Sheet l ATT RNEY.

Dec. 4, 1928.

S. STRUNGE FRICTION SCREW LIFTING MECHANISM Filed April 17, 1926 2 Sheets-Sheet INVENTOR. \f/GU/PD Jmwvaz:

% ATT NEY.

Patented net. 4, teas.

mares srarss SIGUED STBUNGE, .01? WYANDOTTE, MICHIGAN.

a FRICTION SCREVf-LIFTING- MECHANISM.

Application filed April 17, 1926. Serial No. 102 845.

This invention relates to lifting mechanism and the like, and more particularly to such mechanism operating by rollers engaging an unthreaded surface, wherein friction alone is utilized for advancing the members to be lifted, thereby rendering unnecessary the use of interengaging screw threaded members for such purposes.

It has long been'a desideratum among ensatisfactory unthreaded lifting mechanism in lifting comparatively heavy members such, for example, as the molds utilized in building concrete walls, piers, etc. Where the walls, etc. are of comparatively great height the provision of threaded poles for carrying the molds and lifting apparatus is quite expensive, and the transportation of such poles from one Oh to another is difficult and hazardous. One object of my invention is the provision of apparatus for lifting comparatively heavy members by the use of unthreaded poles and unthreaded cylinders engaging therewith.

Another object of my invention is the arrangement of a plurality of friction rollers within a turnable frame and adapted to engage an unthreaded pole or shaft so that when the frame is rotated inone direction the rollers will spirally advance upon. the pole or shaft.

A further object of my invention is the provision of a friction roller having a curved periphery shaped so thatit may engage the surface of a shaft or pole in a plurality. of points, with means for mounting such roller and maintaining it in contact with the shaft.

Other objects and advantages will be apparent from the following description,-

wherein reference is made to theaccompany ing drawings illustrating a preferred embodiment of my invention and wherein similar reference numerals designate similar parts throughout the several views. In the drawings: V

Fig. 1-is a. plan view of my improved lift- .ing mechanism mounted upon a frame carrying molds adaptable for use in building concrete walls. l

Fig. 2 is aside elevationthereof. Fig. 3 is an enlarged vertical sectional view, taken substantially on" the line 33 of Fig.1. I V

Fig. lisa detail cross sectiontaken sub- "'sa1as11y on theline i Figi gineers, contractors and others to employ.

Fig. 5 is a detail perspective view of the support member for the lower extremities of the friction rollers. V

Fig. 6 is a detail elevation of the means for adjusting the position of the member supporting the upper extremities of the friction rollers, and

Fig. 7 is a detail section taken substantially on the line 7 of Fig. 3.

Referring now to the drawings, the numeral 5 designates an electric motor or other suitable source of power adapted to rotate the shaft 6 carrying-a worm gear 7 or the like arranged to mesh with a worm pinion 8 fixed upon the periphery of the barrel or frame 9 in which my friction rollers 10 are carried. The rollers 10 are shaped with their peripheries concave to a slight extent, and are mounted within the barrel 9 on shafts 11 arranged at an angle to the vertical axis of the barrel, substantially as shown in Figs. 3 and 4. The longitudinal axes of the shafts 11 are arranged in planes intersecting each other and both intersecting the vertical plane of a supporting pole or shaft 12 extending substantially centrally through the barrel 9 between the rollers 10. The lower extremities of the shafts 11 are mounted within apertures 13 in a bottom plate lat adapted to be secured within the barrel S), as by screws 15 or other fastening means, and the w rollers 10 are arranged to rotate freely upon the shafts 11, as by suitable antifriction ball bearings 16 adjacent each extremity of the rollers 1O (11ote Figs. 2) and 7). The upper extremities of the shafts 11 pass through apertures 17 in a top plate 18 arranged within the barrel 9 adjacent its upper extremity. The top plate 18 rests upon the upper roller bearings of the cylinders 10, and is adjustably mounted within the barrel 9 so as to permit rotation of the top plate 18 relative- 1y to the barrel. The particular means of adjustment herein disclosed for the movement of the top plate 18 is best shown in Figs. 1 and 6.. The barrel 9 is formed adjacent its upper extremity with a bayonet slot 19 and thetop plate 18 is formedwith a radially projecting lug 20 adapted to enter and be seated within the bayonet slot 19.

One face of the lug 20 is shaped for engagement by an adjusting bolt 21 threaded within an ear 22 fixed upon the barrel 9 in hori- Zontal alignment with the lower portion of the bayonet slot 19 (note Fig. 6). In pracall) " climb .iipon the shaft or pole 12.

.Ward movement of the rollers Wlll continue tioe, the lug 2O of the top plate is passed through the vertical upper portion of the bayonet slot 19 and then swung into the horizontal lower portion of the bayonet-slot beneath the upper wall of the bayonet slot. This serves to prevent accidental dislocation of the top plate 18 while the apparatus is in use, and also provides "means for swinging the upper portion of the shafts 11 and rollers 10 to provide. nieansto seat the rollers against the surface of the shaft 12 with various pressures. llheturning of the ad- -justing bolt '21 in the proper direction will force the lug further into the horizontal oortion of thebavonet slot 19 and so swin t:

the upper portions of the shafts 11 and rollers 10. 7

By virtue ofthis construction a pole or shaft l2 can belixcd in any'desired position, forexamplevertically, and the rollers 10 then brought into frictional contact therewith,substantially as shown in F 3 and l, ,n'hereuponithe turning of the barrelt) in the :proper'direction w-iilcause the rollers 10 to The upaslong as the rotation of the barrel 9 is constinuethiand the advaneeupon the shaft 12 is contingent uponthearrangement of the rollers relatively to the shaftas well as upon the degree of concavityof the peripheries of the rollers 1O. Itvis preferred that the arrangement. of the rollers as well as the degree of curvature oftheir peripheries be such that the advance movement of the rollers upon the shaft 12 is relatively small, as f(')l0XtUllbe apparent that the barrel and attiaohed parts can be again lowered by reversing the rotation of the barrel whenever desired. I prefer to mount the motor 5 or othersource of powervfor rotating the harrel 9 upon aframewe e inoyable with the barrel. In the illustrated embodiment I have shown t-he'niotor 5 wmountedon the upperdeck 23:0f a. fra1ne work 2 l'supporting a pair of molds 25suitable for use in building concrete walls and --the like. As best shown in Fig. 2 the molds 25 are formed with vertical portions separated-from each other-by the widthiof the wall to be built and held in sueh positions by means of horizontal portions 25 on the 'inoldsas Well as'by :braee blocks 26 fixed hetween-the outer wa-llsof the vertical. portions of the molds and thelower portiousrof the framework 2.4:; ii'erods 2? may be suitably arranged betu 'eenthe. blo'elzs2ti and a sleeve .QBsurrounding and resting upon a depending ,collared member carried hvthelbottom plate 14: of the barrel 9, whereby'the weight of the molds 25, framework ,24: and motoro are directly carried by the barrel 9. The collared portion 29 has a central vertical opening of greater, area than the diameter of the pole 12 and is pre-fe ralilysecured to a collar 00 upon the bottom: plate 1% of the barrel 9 (note F1 3). The collared portion 29 rotates with the c barrel 9 within the sleeve 28, and the lower extremity of the sleeve 28 rests upon a ball -bearing carried upon the uppeusurfaee of the base'ofrthe collared portion 29, substantially as shown in: 2

In nracticeithe molds25 aresetfor the first pouring ofeo ncrete, and then afterthis-ponra ables-therol lersv10 to'climbupon theshaft12 1 and pull with theinitheframework; 2-32 "and molds 25, as above recited. When the vdesired new position. of the molds has been reached the motor 5, is stopped andthe next pouring ofconcrete made. Thepperation is repcatcdias oftenns :desired. The shaft- 12 can be buried Within the concrete poured, if desired. i 1;,

ltrom theabove itgwill be obvious-that lifting means for comparatively heavy members, sui'h as concreteinolds, is-provided' whichiclo not necessitatethe use'of threaded polesor shafts. but insteadLpoles or shafts having smooth or slightly roughened surfaces an be utilized. v i a it will further beobvious thatya plu ality of my improved :lifting mechanismscan be operated in unison, ras for lifting ,inolds of comparatively great length, such as are used in building concretelpiers, etc. '4 a lVhile it will be apparent thatlthe illustrated :embodiment of my invention herein disclosed is well:calculated to adequately ful- 'fill the :objects \andladvanta 'es-, primarily stated. it is to be understood t at the invention: is susceptibletto variation, modification and change within thespirit'and scope of the subjoined claimsr l i 1.1;.

- Having described my innent-iomfl claim:

1. Lifting mechanisni comprising'va pole, a: plurality of angularly arranged friction rollers engaging the lperiphery of the pol s, 2.

frame encircling thepoleiand. carrying the rollers, and means for rotating-the frame.

2. Lifting mechanism comprising a pole, aplu 'ality of angularly arranged friction rollers engaging the periphery ofthe pole, a fraine encircling the pole and carrying. the rollers, means for rotating the :framepand rollers, and-means for adjusting the pressure of contact of the rollers upon thefpole. I I

3. Lifting mechanism.comprising a pole, a plurality of angularly arranged frictionjrollers engagi11g the. periphery, Qfvfhe pole a frame encirclingmthe pole and carrying the rollers, and means for rotating the frame, the

rollers being arranged in intersecting planes and rotatable with the frame.

4. Lifting mechanism comprising a pole, a plurality of angularly arranged friction rollers engaging the periphery of the pole, a frame carrying the rollers having a fixed bottom plate and a. movable top plate through which the shafts of the rollers project, means for adjusting the position of the top plate to vary the pressure of contact of the rollers upon the pole, and means for rotating the frame.

5. Lifting mechanism comprising a pole, a plurality of angularly arranged friction rollers engaging the periphery of the pole, a frame carrying the rollers, and means for rotating the frame, comprising a worm pin ion fixed upon the frame, a worm gear meshing with the pinion, and means for rotating the worm gear.

6. Lifting mechanism comprising a shaft, a frame surrounding the shaft, a plurality of friction rollers engaging the periphery of the shaft and journaled in the frame, said rollers having concave peripheries and being angularly disposed in intersecting planes, and means for rotating the frame to advance and recede the rollers and frame upon the shaft.

7 Lifting mechanism comprising a shaft, a plurality of angularly arrange-d friction rollers engaging the periphery of the shaft, a frame surrounding the shaft and carrying said rollers, said rollers having concave peripheries and being angularly disposed in intersecting planes, means for rotating the frame to advance and recede the rollers and frame upon the shaft, and a collared portion carried by the frame and adapted to support the members to be lifted.

8. Lifting mechanism comprising a shaft, a plurality of angularly arranged friction rollers engaging the periphery of the shaft, a frame surrounding the shaft and carrying said rollers, said rollers having concave peripheries and being angularly disposed in intersecting planes, means for rotating the frame to advance and recede the rollers and frame upon the shaft, a collared portion depending from the frame, and a sleeve encircling and resting upon the collared portion, whereby the members to be lifted are secured upon the frame.

9. Lifting mechanism comprising a shaft, a plurality of angularly arranged friction rollers engaging the periphery of the shaft, a frame surrounding the shaft and carrying said rollers, said rollers having concave peripheries and being angularly disposed in intersecting planes, means for rotating the frame to advance and recede the rollers and frame upon the shaft, a collared portion depending from the frame, a sleeve encircling and resting upon the collared portion, and a framework depending from said sleeve.

10. Lifting mechanism comprising a pole, a barrel loosely surrounding the pole, a pair of stub shafts angularly disposed within the barrel, concave rollers journa-led upon the stub shafts and contacting the periphery of the pole, means for varying the pressure of contact of the rollers upon the pole including a turntable top plate within the barrel and having a lug projecting through a slot in the barrel, an adjusting bolt mounted upon the barrel for engagement with the lug, the barrel having a bayonet slot with its longer portion in alignment with the adjusting bolt.

In witness whereof I hereunto set my hand.

SIGURD STRUNGE. 

